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Titolo:
INFLUENCE OF INITIAL SUBSTRATUM SURFACE-TENSION ON MARINE MICRO-FOULING AND MACRO-FOULING IN THE GULF-OF-THAILAND
Autore:
BECKER K; SIRIRATANACHAI S; HORMCHONG T;
Indirizzi:
BIOLAB RES INST,KIELER STR 51 D-24594 HOHENWESTEDT GERMANY BURAPHA UNIV,FAC SCI BANGSAEN CHONBURI 20131 THAILAND SIAM UNIV,FAC SCI BANGKOK 10163 THAILAND
Titolo Testata:
Helgolander Meeresuntersuchungen
fascicolo: 4, volume: 51, anno: 1997,
pagine: 445 - 461
SICI:
0174-3597(1997)51:4<445:IOISSO>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLID-SURFACES; BACTERIAL ATTACHMENT; ADHESIVE STRENGTHS; BALANUS-BALANOIDES; BRYOZOAN LARVAE; CONTACT ANGLES; CYPRIS LARVAE; FREE-ENERGIES; SETTLEMENT; BARNACLE;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
79
Recensione:
Indirizzi per estratti:
Citazione:
K. Becker et al., "INFLUENCE OF INITIAL SUBSTRATUM SURFACE-TENSION ON MARINE MICRO-FOULING AND MACRO-FOULING IN THE GULF-OF-THAILAND", Helgolander Meeresuntersuchungen, 51(4), 1997, pp. 445-461

Abstract

The density of five major groups of fouling organisms (bacteria, diatoms, choanoflagellates, ciliates, macroorganisms) on seven artificial substrata with surface tensions between 19.0 and 64.5 mN m(-1) was studied in the Gulf of Thailand. Two series of test panels of the different substrata were immersed into the sea between 3 hours and 64 days (macrofauna 128 days). The results show that surface tension has a limited impact on the density of the organisms. Only bacteria settled continuously in significantly lower numbers on materials within the minimumbioadhesive range (20-25 mN m(-1)) than on other substrata. Significant differences between the substrata may disappear after long exposure, as in series 2 after 16 days. For diatoms and protozoa, a colonisation pattern similar to that of bacteria with a minimum of 20-25 mN m(-1) was detected after several exposure intervals. However, it was neverrecorded in more than 3 exposure intervals in a row. The colonisationpattern of macroorganisms could not be attributed to substratum surface tension. An index, called ''colonisation degree'' is introduced to give a general impression of the density of organisms on the materialstested. The colonisation degree did not show any significant difference at any exposure interval. The present results clearly suggest that substratum surface tension is easily overshadowed by other factors in colonisation processes under natural conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 00:48:24